Geoffrey II, called Martel ("the Hammer"), was Count of Anjou from 1040 to 1060. He was the son of Fulk the Black. He was bellicose and fought against William VII, Duke of Aquitaine, Theobald I, Count of Blois, and William, Duke of Normandy. During his twenty-year reign he especially had to face the ambitions of the Bishop of Le Mans, Gervais de Château-du-Loir, but he was able to maintain his authority over the County of Maine. Even before the death of his father in 1040, he had extended his power up to the Saintonge, where he founded the Abbey aux Dames. The first mention of this man in the Gesta Normannorum Ducum reads:
"Geoffrey, count of the Angevins, nicknamed Martel, a treacherous man in every respect, frequently inflicted assaults and intolerable pressure on his neighbors."
"In alliance with King Henry I of France, Count Geoffrey laid siege to Tours in the winter of 1042–3. After the battle of Nouy on 21 August 1044 Count Theobald I of Blois-Chartres (1039–89) was taken prisoner by [Count Geoffrey], to whom he surrendered Tours with Chinon and Langeais, excluding, however, the monastery of Marmoutier." (ibid)
Henry and Geoffrey became estranged after this, and were not reconciled again until c. 1052, when their names appear together in a charter of August of that year. This is in conjunction with the rebellion of William of Talou against the duke of Normandy, and Count Geoffrey's taking possession of the city of Mans (shortly after 26 March 1051).